Nipper-jaw for lasting-machines



(No Model.)

G.'A. WILLARD.

NIPPER JAW FOR LASTING'MAGHINBS. No. 566,831. Patented Sept. 1., 1896 WITNESSES: l/VVE/VTQH W @MWM 5 I BY ATTORNEYS.

UNITED STATES ATENT GEORGE A. W'ILLARD, OF PETERBOROUGH, NEW HAMPSHIRE, ASSIGNOR TO THE CHASE LASTING MACHINE COMPANY, OF BOSTON, MASSACHUSETTS.

NlPPER-JAW FOR LASTlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 566,831, dated September 1, 3.896.

Application filed February 21, 1896. Serial No. 580,151. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE A. WILLARD, of Peterborough, in the county of Hillsborough and State of New Hampshire, have invent-ed an Improved N ipper-J aw for Lasting- Machines, of which the following is a specification, reference being had to the accompanying drawings, in which- Figure 1 is a side elevation. Fig. 2 is a central longitudinal section. Fig. 3 is a plan view of my nipper-jaw, and Fig. at is a sectional elevation of a modification.

My invention is a nipper-jaw for lastingmachines in which the spring-pressure, by means of which the adjustability of the nippers to difierent thicknesses of stock is obtained, is provided by compressing a spring and not by stretching a spring, as is the case in nippers heretofore known, as, for example, in patent to Dalpe, No. 536,780, dated April 2, 1895, the result beinga nipper much more efficient and durable than any other nipper.

In the drawings, A is the fixed member of the nipper-jaw, having the guides at and projections Ct fast to it, one end of the fixed member forming one of the jaws b of the nipper, which acts, in conjunction with the other jaw 1), upon the moving member B. The moving member B slides in the guides and is connected to the lever E by links D. The lever E is slotted at its lower extremity and carries a spiral spring F about its lower part, which spring presses at its upper end against the pin cl, which connects links 1) to lever E, and at its lower end against the projections a. The slotted end of lever E works upon pin a between the projections a.

The operation is as follows: When the nipper is ready to take hold of the stock, (see Fig. 1,) the spring F tends to force the lever E away from the projections a until the end of the slot comes in contact with the pin a When the nipper is closed upon the stock, (see Fig. 2,) the moving member B being prevented by the stock between the jaws Z) I) frombeing drawn inward its full length, the lever is compelled to yield against the resistance of spring F, the yield of lever E being rendered possible by the slot in the lower end of lever E.

In the modification shown in Fig. 4 the lower end of the lever E works upon the pin 0. the middle portion of lever E is slotted, and pin cl, to which the ends of links D are secured, Works in the slot. Spring F surrounds the lower portion of lever E between pin 61 and projections a. It will be obvious that byinserting stock between the jaws b l) the links D, which are fast to moving member B, are in effect shortened and the pin 01 moved in the slot against the resistance of spring F.

\Vhat I claim is- In combination, jaw members A and B; slotted lever E carrying a spring F and fulcrumed upon member A 3 spring F and links D connecting lever E and member B; all organized and operating substantially as described.

GEORGE A. XVILLARD.

Witnesses:

O. L. DIXON, A. A. HARPER. 

